CDL GENERAL KNOWLEDGE TEST (CO) - PRACTICE TEST
41.
Which of the following statements about backing is TRUE?
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Backing is always dangerous.
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You should avoid backing whenever you can.
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When you have to back, you should back and turn toward the driver's side whenever possible.
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All of the above.
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42.
The best way to test the trailer service brakes is to:
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pull forward quickly, then apply the trailer brakes with your hand control.
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put the handbrake on when there are no vehicles around you.
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accelerate to the maximum possible speed, then apply the trailer brakes fully.
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None of the above.
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43.
What is a pull up when referring to truck driving?
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When a driver stops and pulls forward to get a better position.
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Using the speedometer to know when to shift up.
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A driving maneuver used to pull your vehicle over to the side of the road and stop.
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A specific maneuver used to decelerate smoothly in the exit lane.
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44.
The posted speed limit for a curve:
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may be too fast for many trucks or buses.
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is safe for trucks or buses, but it may be too fast for cars.
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is safe for all vehicles.
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is optional and may be exceeded.
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45.
When you discover a fire, if the trailer doors are hot you should not open them because:
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the temperature of the trailer should not be changed in any way.
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with air many fires do less damage.
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you should use the fire extinguisher on the door.
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opening the doors lets air in and may make the fire flare up.
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46.
To prevent drowsiness before a trip, you should:
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drive with the windows rolled down.
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avoid driving with a passenger.
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avoid medications that cause drowsiness.
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drink 2 cups of coffee.
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47.
Drivers who must stop on a road or the shoulder of any road must put out their emergency warning devices within:
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5 minutes
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20 minutes
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10 minutes
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15 minutes
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48.
A high center of gravity:
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means your vehicle is more likely to tip over.
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helps the vehicle be more stable while turning.
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is less dangerous in curves.
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means you'll have better traction.
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49.
To test the parking brake:
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check that all shut-off valves are in the open position.
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turn off the engine.
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step on and off the brake pedal to reduce air pressure.
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gently try to pull forward with the parking brake on.
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50.
You hear a loud "bang" which sounds like a tire blowout. You should:
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assume you
have a tire failure.
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keep driving as normal.
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inspect your tires with your mirrors.
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check the tires at the next stop.
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